Thermophysical properties of the Al83Co10Ce7 glass-forming alloy in crystalline and liquid states

• Published in: Journal of alloys and compounds Vol. 589; pp. 420 - 424
• Main Authors: Uporov, S.A., Bykov, V.A., Yagodin, D.A.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15-03-2014
• Subjects: Al-based alloy; Liquid state; Metallic glass; Thermophysical properties; Liquid state; Al-based alloy; Thermophysical properties; Metallic glass
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2013.11.228

•Anomalous changes in electronic properties of the alloy in liquid state were found.•The Lorenz function calculated significantly deviates from the theoretical value.•The strong chemical interaction between the components of the alloy was revealed.
In the temperature range of T=300–1900K, covering the crystalline and liquid states, the electroconductivity, thermal diffusivity, thermal conductivity, density and magnetic susceptibility of Al83Co10Ce7 glass-forming alloy were studied. It is established that the values of electrical and thermal conductivity of the system investigated are relatively low (in comparison with pure aluminum). Analyzing temperature dependence of Lorentz function obtained, we found that the lattice contribution in total thermal conductivity is essential. In liquid state above T>1700K, the anomalous changes in electroresistivity and magnetic susceptibility of the alloy were revealed. These high-temperature anomalies are accompanied by neither detectable thermal effects nor significant changes of alloy density. It was found that the density of the alloy investigated is greater for the liquid state than for the solid one. The experimental results obtained are discussed in the frames of conjecture about existence of chemically interacting Al2REM associates in the melt.